38721341355655 has 32 divisors (see below), whose sum is σ = 53317395947520. Its totient is φ = 26445063738240.

The previous prime is 38721341355637. The next prime is 38721341355659. The reversal of 38721341355655 is 55655314312783.

It is not a de Polignac number, because 38721341355655 - 2⁵ = 38721341355623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38721341355655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38721341355659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6779526 + ... + 11108764.

It is an arithmetic number, because the mean of its divisors is an integer number (1666168623360).

Almost surely, 2^{38721341355655} is an apocalyptic number.

38721341355655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38721341355655 is a deficient number, since it is larger than the sum of its proper divisors (14596054591865).

38721341355655 is a wasteful number, since it uses less digits than its factorization.

38721341355655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330279.

The product of its digits is 45360000, while the sum is 58.

The spelling of 38721341355655 in words is "thirty-eight trillion, seven hundred twenty-one billion, three hundred forty-one million, three hundred fifty-five thousand, six hundred fifty-five".